Service manual

CA-28
CA TROUBLESHOOTING
2. Shutdown
Start
Does the set
power up for
more than 2
seconds?
Does the DC
level at pin 29,
ICX2200 rise
above 3.5 volts?
Check
microprocessor
ciruitry.
No
Yes
Check HV-
shutdown circuit,
sweep
transformer.
Does the set
shutdown after
just 3 seconds?
Check IC2100 &
CRT protection
circuit.
Yes
Yes
No
No
Is B+ running at
a constant DC
level?
Replace
ICX3400
No
Yes